Tanaka Hayato, Tsukagoshi Akira
1 Takehara Marine Science Station, Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University, 5-8-1 Minato-machi, Takehara, Hiroshima 725-0024, Japan.
Zoolog Sci. 2014 Nov;31(11):758-65. doi: 10.2108/zs140128.
The morphology of non-genitalic structures in males is often associated with mating and courtship, and the evolution of those structures may cause speciation. In the present study, we describe a new species of marine interstitial ostracod from Japan. Morphological comparisons and molecular phylogenetic analysis based on ITS (internal transcribed spacer) 1 and ITS2 sequences revealed intraspecific variation on the male upper lip in the new species. The male upper lip of Parapolycope Klie, 1936 species has been reported to be related to mating behavior, and it likely produces species-specific stimuli for the female. The results of this study suggest that the male upper lip morphology in Parapolycope changed at the early stage of the speciation process.
雄性非生殖器结构的形态通常与交配和求偶相关，这些结构的进化可能导致物种形成。在本研究中，我们描述了一种来自日本的海洋间隙性介形虫新物种。基于ITS（内转录间隔区）1和ITS2序列的形态学比较和分子系统发育分析揭示了该新物种雄性上唇的种内变异。据报道，1936年的Parapolycope Klie属物种的雄性上唇与交配行为有关，并且可能会为雌性产生物种特异性刺激。本研究结果表明，Parapolycope属的雄性上唇形态在物种形成过程的早期发生了变化。
